Preheat oven to 350 degrees. Flour and butter a 9 x13 x 2 pan.
Sift flour into a bowl. Mix flour, baking powder, salt, and baking soda. Set aside.
Melt butter. In mixing bowl, place melted butter and add sugar, mixing well. Add eggs and vanilla, mixing well.
Add flour slowly, blending. Batter will be slightly thick. Spread in pan. Sprinkle chocolate chips and pecans over all.
Bake for 25 to 30 minutes.Makes 4 Source: